Istanbul Stock Exchange Developments: YEOTK, DOFRB, and More

Key Developments in Borsa Istanbul

As of December 23, 2025, we have compiled noteworthy developments in Borsa Istanbul. Here are company news that closely affect the markets.

Yeo Technology (YEOTK)

Yeo Technology has increased the value of its solar power plant installation service contract with Yazıcı Demir Çelik from 66 million USD + VAT to 73.84 million USD + VAT, raising it by 7.84 million USD. This situation supports the company's growth objectives in the energy sector.

Aksa Energy (AKSEN)

Aksa Energy's subsidiary Aksa Renewable Energy has signed a turbine supply contract with Goldwind International and Goldwind Turkey for a planned 100.08 MW storage wind power plant project in Mersin. This project is an important step towards increasing renewable energy sources.

Vakıfbank (VAKBN)

Vakıfbank has signed a new credit agreement totaling 300 million USD with the Asian Infrastructure Investment Bank. The agreement stands out as part of the company's efforts to broaden its financing resources.

Gülermak (GLRMK)

Gülermak has signed a conditional share purchase agreement to acquire 100% of the shares owned by Orrön Klein Teetzleben, Orrön Javenitz, and Orrön Trebenow through its 100% owned subsidiary Gülermak Renewables Deutschland Holding. The total sale price has been set at 11.23 million euros.

Koton (KOTON)

Koton has opened its second corporate store in Qatar at the City Center Shopping Mall in Doha, continuing to increase its store count in the Gulf Region. By the second half of 2025, the total number of corporate stores opened in this region has reached 10.

What's Happening in Global Markets?

In global markets, the positive sentiment towards technology companies continues to grow. With expectations for a year-end rally in the stock markets, risk appetite remains high. The focus is on upcoming growth data to be released in the U.S.

Gold and Silver

As of Tuesday, gold has reached record levels, approaching 4,500 dollars per ounce, while silver has also seen record levels at 69.98 dollars.

Recent Developments in the Turkish Economy

In Borsa Istanbul, the BIST 100 index is trading at 11,307.24 points with a decrease of 0.03%. According to the Central Bank of Turkey's latest analysis, it has been observed that the reductions in the policy interest rate have reflected in the pricing of credits and deposits in the banking sector.

In the free market, the dollar is trading at 42.82 lira, and the euro is at 50.58 lira. The gram gold continues to trade around 6,162 TL.

These developments provide an important roadmap for investors and market participants. You can determine your investment strategies considering short-term market fluctuations.